Photo to Sprite Converter

A game sprite is a small image with a big job: read clearly at 16×16 pixels, sit cleanly on any background, and use as few colors as possible. This photo-to-sprite converter turns photos and illustrations into genuine sprites — transparency preserved, resolutions down to true 16×16, limited palettes that read well tiny, and crisp exports built for game engines. Free, instant, and 100% client-side.

What makes a good game sprite?

Three things separate a sprite from a shrunken photo. Readability: at tiny sizes, only strong silhouettes and bold color masses survive — fine detail becomes noise. Limited colors: classic sprites used 4–16 colors; restraint is what makes them look intentional instead of muddy. Clean transparency: the sprite must composite over any background without halos or fringes. The converter is built around exactly these three: the Pixel Block Size slider controls readability, the palette presets enforce color discipline, and the alpha channel survives conversion untouched.

Transparency, preserved end to end

Upload a PNG with a transparent background and the converter keeps it: transparent pixels stay transparent through downsampling, quantization, and dithering, and both export paths — PNG and vector SVG — retain the alpha channel. Semi-transparent edge pixels below the threshold are treated as transparent, which prevents the dirty fringes that cheap converters leave around cutouts. For best results, isolate your subject first (remove the background in any editor, save as PNG with transparency), then convert — a clean cutout in means a clean sprite out.

Nailing 16×16, 32×32, and 64×64

Exact sprite resolutions are just math: divide your source width by the pixel block size. A 512px source at 32px blocks = a true 16×16 sprite; at 16px blocks = 32×32; at 8px blocks = 64×64. The live badge under the preview shows your exact output grid (e.g. “32×32 px in 38ms”), so there’s no guessing. Smaller sprites need bolder source images — zoom out mentally: if the silhouette doesn’t read as a thumbnail, it won’t read as a sprite. When in doubt, start at 32×32; it’s the most forgiving classic sprite size.

Sprite-friendly palettes

At sprite resolutions, fewer colors almost always look better. PICO-8’s 16 colors are the modern indie standard for sprites — balanced, readable, cohesive. NES’s 30 colors give a more authentic 8-bit feel with room for shading. The Full Color / Adaptive palette with the color count dragged down to 8–12 extracts a tight, harmonious set from your specific image. Avoid dithering at the smallest sizes — below 32×32, dither patterns read as noise rather than shading; switch dithering to None (Solid) for the cleanest tiny sprites, and use the pixel grid overlay to check every pixel.

From photo to sprite: a practical workflow

1. Isolate the subject — cut out your character or object and save as PNG with transparency.
2. Upload — drag it into the converter (PNG, JPG, WEBP, or GIF up to 25MB).
3. Set the resolution — choose pixel blocks for your target size (16×16, 32×32, 64×64).
4. Limit the palette — PICO-8, NES, or Adaptive at 8–16 colors; dithering off for tiny sprites.
5. Inspect — toggle the pixel grid overlay and check edges at full zoom.
6. Export — download PNG at 1× or 2× for engine import, or copy the palette HEX for hand touch-ups.

What about animation and sprite sheets?

An honest note on scope: the converter processes one still image at a time — it doesn’t assemble multi-frame sprite sheets or preserve GIF animation (GIF uploads convert as a single still frame). The intended workflow is to convert each frame or sprite individually with identical settings, then arrange frames in your engine or a sprite-sheet tool. Because conversion is instant and deterministic, running a dozen frames through the same settings takes minutes and keeps every frame visually consistent.

Silhouette first: the thumbnail test

Here’s the professional sprite test, and it takes five seconds: shrink your source image to thumbnail size (or just squint). If you can still tell what it is — a knight, a slime, a spaceship — the silhouette is strong enough to survive sprite-ification. If it dissolves into mush, no converter settings will save it; simplify the source first (tighter crop, cleaner background, bolder shapes). Great sprites are designed silhouettes first and details second. This is also why character portraits and simple objects convert better than busy scenes — one clear subject, one clear shape.

Using the palette HEX in your engine

After converting, click Copy Palette HEX to grab the exact color list as hex codes. Paste it into your engine’s palette asset, your sprite editor’s swatches, or a CSS file for web games — now your hand-drawn touch-ups and UI elements use byte-identical colors to the converted sprite. This is how small teams keep a whole game visually coherent: one palette, everywhere. Combined with identical conversion settings across all sprites, it’s the closest thing to an art director in a button.